550i 2006 having white smoke problems. Taken to 2 shops, no solution. HELP!

Yes, started there. Took it about 4-5 times, they have not found problem. Told me "not to worry that it would not effect driving or performance". But it continues to smoke.

WOW THATS NOT VERY PROFESSIONAL.THERE IS A PROBLEM AND IT WILL GET WORSE.IL LOOK UP TSB'S FOR YOU AND RECALLS. NO TSB'S OR RECALLS THERE ARE A COUPLE ON OIL RING ISSUES ON ANOTHER WEBSITE. DID THEY DO A LEAK DOWN TEST THAT YOU KNOW OF? PERSIST ON THEM TO FIND PROBLEM AND DON'T TAKE THERE ITS OK ANSWER. TELL THEM TO FIND THE PROBLEM. IS IT STILL UNDER WARRANTY?

It's your valve seals. Have same problem. Big job. It's happening course of long oil change intervals. V8 should have a oil change every 10 000 km.Or once a year.